The difference between exhausts on the OE bike setup is nothing, however to purchase a slip on exhaust for 2017 onwards you are directed to the E4 compliant version of the slip on. The E4 versions are designed so that the baffle/db killer insert is NON Removable. If you want the option to remove it buy the earlier year slip on. It still fits but the baffle/db killer can be removed.
4 wheels move the body, but 2 wheels move the soul.
1982 Honda CB750 BOL D'OR
2017 Kawasaki GTR 1400
2017 Suzuki GSX S1000